使用JS使用拆分組織陣列

我需要使用 split 函陣列織我的陣列并遍歷陣列中的多個專案。

我有一個看起來像這樣的陣列

var arr = [
{
"name": "bob",
"date": "1-1-2018",
"statistic": [
      "some title: 92nd (source, 2014)",
      "another title: 2.56 (source, 2014)",
      "title: 52.8% women (source, 2007/08)",
      "some title: 21.9% (source, 2016)",
      "another title: 3rd (source, 2016)"
    ]
},
{
"name": "sally",
"date": "1-1-2020",
"statistic": [
      "title: 8th (source, 2014)",
      "some title: 92nd (source, 2014)",
      "another: 40.8% women (source, 2007/08)",
      "some title: 21.9% (source, 2016)",
      "another title: 3 children (source, 2016)",
      "some title: 23rd (source, 2016)"
      "title: 46% (source, 2016)"
    ]
},
{
"name": "chris",
"date": "1-1-2021",
"statistic": [
      "some title: 46th (source, 2014)",
      "another title: 92nd (source, 2014)",
      "title: 52.8% women/children (source, 2007/08)"
    ]
},
//etc...
]

這是我嘗試過的

 for (let i=0; i < arr.length; i  ) {
    for (let x=0; x < arr.length; x  ) {
      arr[i].custom = {};
      arr[i].custom["statistics"] = [];
    var s = arr[i].statistic[x].split("(");
    console.log(unit);
    var l = s[0].split(":");
    var u = l[1].split(" ");

    arr[i].custom["statistics"].push({
      number: u[1],
      suffix: u[0],
      label: l[0],
      source: s[1]

    });
  }
}

如何使我的代碼看起來像這樣？

var arr = [
{
"name": "bob",
"date": "1-1-2018",
"statistic": [
      "some title: 92nd (source, 2014)",
      "another title: 2.56 (source, 2014)",
      "title: 52.8% women (source, 2007/08)",
      "some title: 21.9% (source, 2016)",
      "another title: 3rd (source, 2016)"
    ],
"custom": {
      "statistics": [
{
    "number": "92nd",
    "suffix": "",
    "label": "some title",
    "source": "source, 2014)"
  },
  {
    "number": "2.56",
    "suffix": "",
    "label": "another title",
    "source": "CIA, 2017)"
  },
  {
    "number": "52.8%",
    "suffix": "women",
    "label": "title",
    "source": "source, 2007/08)"
  },
  {
    "number": "21.9%",
    "suffix": "",
    "label": "some title",
    "source": "source, 2016)"
  },
  {
    "number": "3rd",
    "suffix": "",
    "label": "another title",
    "source": "source, 2016)"
  }
],
etc...
}
},

]

當我知道陣列中有東西時，它告訴我“arr [i] .statistic [x]”回傳未定義。我可以稍后修復左括號并將其設為“來源”：“（來源，2014）”

提前致謝

uj5u.com熱心網友回復：

您正在迭代外部陣列兩次，而不是迭代statistic內部回圈中的每個專案。嘗試使用

for (let i=0; i < arr.length; i  ) {
  arr[i].custom = {};
  arr[i].custom["statistics"] = [];
  for (let x=0; x < arr[i].statistic.length; x  ) {
// … further code …

代替你的回圈。

此外，由于我沒有足夠的聲譽來發表評論，所以有一個問題：您是否故意記錄一個unit從未定義過的變數？可能您可能想要登錄s？

uj5u.com熱心網友回復：

您的回圈未正確嵌套，并且您的第二個回圈未迭代正確的專案。您每次都在重新創建 [statistics] 陣列，因此只能在其中獲取最后一項。

var arr = [{
    "name": "bob",
    "date": "1-1-2018",
    "statistic": [
      "some title: 92nd (source, 2014)",
      "another title: 2.56 (source, 2014)",
      "title: 52.8% women (source, 2007/08)",
      "some title: 21.9% (source, 2016)",
      "another title: 3rd (source, 2016)"
    ]
  },
  {
    "name": "sally",
    "date": "1-1-2020",
    "statistic": [
      "title: 8th (source, 2014)",
      "some title: 92nd (source, 2014)",
      "another: 40.8% women (source, 2007/08)",
      "some title: 21.9% (source, 2016)",
      "another title: 3 children (source, 2016)",
      "some title: 23rd (source, 2016)",
      "title: 46% (source, 2016)"
    ]
  },
  {
    "name": "chris",
    "date": "1-1-2021",
    "statistic": [
      "some title: 46th (source, 2014)",
      "another title: 92nd (source, 2014)",
      "title: 52.8% women/children (source, 2007/08)"
    ]
  }
]


for (let i = 0; i < arr.length; i  ) {
  arr[i].custom = {};
  arr[i].custom["statistics"] = [];
  for (let x = 0; x < arr[i].statistic.length; x  ) {
    var s = arr[i].statistic[x].split("(");
    var l = s[0].split(":");
    var u = l[1].split(" ");
    arr[i].custom["statistics"].push({
      number: u[1],
      suffix: u[0],
      label: l[0],
      source: s[1].substr(0, s[1].length - 1)

    });
  }
}
console.log(arr)

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